Crank.



Patented Dec.. I2

C. L. KmnsFATTEn.

C R A N K'.

(Application led Aug. 8, 1898.)

(No Model.)

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STATES PATENT EEicE.

OARL LORENZ KINDSFATTER, OF EAST LIVERPOOL, OHIO.

CRAN K.

SPECIFICATION forming part of Letters Patent Na-39,059, dated December 12, 11899.

Application iiled August 8, 1898.

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`Be it known that I, CARL LORENZ KINDs- EATTER, a citizen of the United States of America, residing at East Liverpool, in the State of Ohio, have invented certain new and useful Improvementsin Cranks for Shafting, ofwhich' the following is a specification, reference being had t-herein to the accompanying drawings.

My invention relates to certain new and useful improvements in cranks for shafting.

This invention relates to an improved device for lever and crank movement adapted for use in various machines in which a reciprocating or rotative movement is required. Such requirements are found in bicycles, power-presses, punchi'ngmachines, powershears, and mechanical feed for various purposes. The mention of these will be sufli cient to illustrate the general application of the movement.

The object of my invention is to provide a mechanism of this character for conveying motion and power; and it consists, essentially, of an auxiliary crank-arm mounted on the end of a shaft, and which has secured thereto the ordinary crank-arm. This latter is likewise mounted on the shaft and has its outer end flush with the outer end of the auxiliary crank-arm and is secured thereto by suitable means. i

My invention further consists in the novel combination and arrangement of parts hereinafter more specifically described, illustrated in the accompanying drawings, and partielllarly pointed out in the claim.

In describing the invention in detail reference is had to the accompanying drawings, in which I have illustrated my invention as applied to a bicycle, and in which- Figure l is a perspective view of my improved mechanism as applied to the shaft of a bicycle. Fig. 2 is a vertical sectional view thereof. Fig. 8 is a detail perspective View of the securing-pin and parts therefor disassembled. Fig. el is -a perspective View of the auxiliary crank-arm.

Referring to the drawings, in which like numerals of reference indicate corresponding parts throughout the several views, l indicates a shaft of a bicycle, showing the drivewheel 2 in dotted lines in Fig. l and in full Serial No. 688,021. (No model.)

lines in'Fig. 2. its end or ends is the auxiliary crank-arm 3, formed with a shoulder 4 and apertures 5 The auxiliary crank-arm is adapted to be mounted on the shaft by insertion of the same through the aperture 5. The inner face of the auxiliary crank-arm at the aperture 6 is adapted to be countersunk, as at 7. The shaft extends a suitable distance from the auxiliary crank-arm to allow the crank-arm S to be mounted thereon, and the auxiliary crank-arm is fastened to the shaft by means of the Cotter-pin 9, operating in an opening l0, formedin the side thereof.

The free end of the crank-arm 8 is apertured, which coincides with the aperture 6 of Mounted upon the shaft near" the auxiliary crank-arm and is adapted to be secured thereto by means of the securing-pin l2, the head 13 thereof fitting neatly in the countersunk portion 7. The pin 12 has a screw-threaded aperture 14 extending longitudinally therein and is adapted to receive the fastening-pin l5, which is adapted to 0pcrate through the washer 16 and fit neatly therein, owing to the washer being countersunk, as at 17.

. It will be seen from theforegoing descrip tion that the general application maybe made of this means for increasing leverage and transmitting power `to the crank-arm, owing to the securing thereto of the auxiliary crankarm. As is the method now the crank-arm is i secured to the shaft at one end, whereas se curing the crank-arm, asI have shown, to the shaft and the end thereof to the auxiliary crank-arm allows for various sizes of crankarms and auxiliary crank-arms to be used and obviates the necessity of changing the shaft when the auxiliary crank-arm is formed integral therewith. arm or auxiliary crank-arm become broken it Furthermore, if the crankcan be readily replaced by a new one without the same to the said shaft, a crank arm mounted on one end of the said shaft engaging the outer face of the said auxiliary crankarm, the said crank-arm mounted upon the said shaft so that one end thereof will he Hush with the free end of the said auxiliary crankarrn, the said crank-arm provided with an opening registering with the opening in the said auxiliary crank-arm, a secu ring-pin arranged in the said opening having its head mounted in the countersunk portion of the opening in the auxiliary crank-arm, the outer end of the said pin provided with a screwthreaded recess, .a Washer having its outer face couni'ersunk and also provided with a centrally-arranged opening registering with the recess in the end of the securing-pin, and a fastening-pin operating through the said opening and secured in the said recess for securing the said crank-arms together, substantially as set forth.

In testimony whereof I aliix my signature in the presence of two Witnesses.

CARL LORENZ KINDSBATTER.

Vitnesses:

JOHN NOLAND, I-I. H.. PATTERSON. 

